/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.streampark.console.core.service.impl;

import org.apache.streampark.console.base.util.WebUtils;
import org.apache.streampark.console.core.service.LogClientService;
import org.apache.streampark.console.core.service.LoggerService;
import org.apache.streampark.flink.kubernetes.helper.KubernetesDeploymentHelper;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;

/** log service */
@Service
@Slf4j
public class LoggerServiceImpl implements LoggerService {

  @Autowired private LogClientService logClient;

  /**
   * view log
   *
   * @param skipLineNum skip line number
   * @param limit limit
   * @return log string data
   */
  @Override
  public CompletionStage<String> queryLog(
      String nameSpace, String jobName, String jobId, int skipLineNum, int limit) {
    return CompletableFuture.supplyAsync(() -> jobDeploymentsWatch(nameSpace, jobName, jobId))
        .exceptionally(
            e -> {
              try {
                return String.format("%s/%s_err.log", WebUtils.getAppTempDir(), jobId);
              } catch (Exception ex) {
                log.error("Generate log path exception:{}", ex.getMessage());
                return null;
              }
            })
        .thenApply(path -> logClient.rollViewLog(String.valueOf(path), skipLineNum, limit));
  }

  private String jobDeploymentsWatch(String nameSpace, String jobName, String jobId) {
    return KubernetesDeploymentHelper.watchDeploymentLog(nameSpace, jobName, jobId);
  }
}
